Halogenated 4.5.8.9-dibenzpyrene-3.10-quinones and process of preparing them



Patented Nov. 21, 1933 1 i HALOGENATED 4.5.8.9-DIBENZPYRENE-3J0- QUINONES AND PROCESS OF PREPARING THEM Georg Kraenlein and Heinrich Vollmann, Frankfort-on-the-Main-Hochst, and Hans Becker, Hofheim in Taunus, Germany, assignors to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing. Application November 25, 1929, Serial No. 409,753, and in Germany December 6, 192s I 11 Claims. (C1. 260-'61) The present invention relates to halogenated 4.5.8.9-dibenzpyrene-3.10-quinones and a process of preparing them.

We have found that vat dyestuffs of the 4.5.8.9- dibenzpyrene-3.10-quinone series containing different halogen atoms possess especially good fastness properties, particularly to washing, and, moreover, partly yield the valuable scarlet tint of the unhalogenated dyestuff whereas, as is well 10 known, iso-(4.5.8.9-) dibenzpyrene-3.10-quinone yields on introduction either of chlorine alone or bromine alone dyestuffs whose tints considerably differ from that of theidyestuff free from halogen dissolves in concentrated sulfuric acid to a 60 Th f*- -l' brown-red solution and dyes cotton in a red vat tammg hglogen m. may be P clear scarlet tintsof very good fastness properties.

by after-chlorinatlon of prommated d1benzpy- (2) 10 parts of m0noch1oro 4 58 9 dibenzpy renectuinones. as wen as i t q of rene-3.10-quinone (obtainable by condensing chlorinated dibenzpyrenequmones. The position 2(p chlorobenmy1) mmmmmone by means of 65 atoms first an that of the sodium aluminium-chloride while heating) are mme atoms mfiuences dissolved in 100 parts of chloro-sulfonic acid, and

As halogenated agents there may be used both 0.5 parts of iodine as well as 7.5 parts of bromine are added. The mass is stirred at 65 C. until halogen itself or an agent splitting ofl halogen. The reaction is preferably carried out in the presence of a solvent, such as chloro-su lfonic acid, concentrated sulfuric acid, oleum or thelike, It may also be advantageous to gently ,heatthe solution or to add a catalyst, such as, for instance,

then decomposed as indicated in Example 1 The dyestuff thus obtained dyes cotton in a red vat an evidently more bluish red tint than the iodine, iron or the like. The halogenation dyestufi obtained according to Example It may likewise ,be effected in a melt of alkali and the following probable constltutwn' 75 aluminium chloride. v 01 The following examples serve to illustrate the I invention, but they are not intended to limit it v thereto; the parts being by weight: 3 (1) To 25 parts of dichloro-4.5.8.9-dibenzpyrene-3.10-quinone, (obtainable'by treating 1.4- di-para-chloro-benzoylnaphthalene with sodiumaluminium-chloride at a temperature of about 150 C.160 C. while introducing oxygen) dis- 40 solved in 10 times its weight of chloro-sulfonic acid, 0.5 parts of iodine and 15 parts of bromine are added. After the mass has been stirred for 6 7 hours at 0., it is diluted with sulfuric acid r g V and-decomposed by means of ice-water. The r; dyestuff which separates in the form of red flakes *(3) 5 parts of m n b m0 39 95!- and which has the probable following formula rene3,10-quinone, (obtainable by condensing the whole quantity of bromine is consumed and 70 para-bromo-benzoyl-2-benzanthrone by means of sodium-aluminium-chloride in the presence of oxygen), dissolved in 250 parts of chloro-sulfonic acid and 0.2 parts of iodine are treated with chlorine until a test portion on decomposition with water no longer yields bluish-red, but yellowishred flakes. The dyestuif, after being isolated as in the preceding examples, dyes cotton in a reddish-violet vat clear orange-red tints; It has the following probable constitution:v

an inorganic solvent of the group consisting of chlorosulfonic acid, concentrated sulfuric acid and oleum with a halogenating agent the halogen of which is difierent from the halogen already present in the starting material.

2. The process which comprises treating, while gently heating, a 4.5.8.9-dibenzpyrene-3.10-quinone, substitutedby one or more halogen atoms,

in thepresence of an inorganic solvent of the group, consisting of chlorosulfonic acid, concentrated sulfuric acid and oleum and a halogenation catalyst with halogen which is different from the halogen already present in the starting dvemg cotton from a vat'a decidedly more material. I i 3. The process which comprises treatingv a di- 1 halogen-4.5.8.9-dibenzpyrene-3.lO-quinone in the presence of an inorganic solvent of the group consisting of chlorosulfonic acid, concentrated sulfuric acid and oleum with a halogenating agent the halogen of which is different from the halogen already present in the starting ma--' terial.

4. The process which comprises treating, while gently heating, a dihalogen-4.5.8.9-dibenzpyrene- 3.l0-quinone in the presence of an inorganic solvent of the group consisting of chlorosulfonic acid, concentrated sulfuric acid and oleum and a halogenation catalyst with halogen which is different from the halogen already present in the starting material.

5. The process which comprises treating, while gently heating, a dichloro-4.5.8.9.-dibenzpyrene- 3.10-quinone in the presence of,:an inorganic solvent of the group consisting of chlorosulfonic acid, concentrated sulfuric acid and oleum and a halogenation catalyst with bromine.

. 6. The. process which comprises treating, while gently heating'to at emperature of about 50 CL,

a dichloro-4.5.8.9-dibenzpyrene-3.IO-quinone in the presence of chloro-sulfonic acid and a small quantity of iodine with bromine.

7. As new products 4.5.8.9-dibenzpyrene-3.10- quinones containing at least two halogen atoms of diiferent kind, said products being vat dyestuffs of very good fastness properties.

8. As new products tetra-halogen-4.5.8.9-dibenzpyrene-3.10'-quinone wherein two halogen atoms are chlorine and the other two are bromine, said products being vat dyestuffs of very good fastness properties.

- 9. As a new product a dichloro-dibromo-4.5.8.9-

1 .dibenzpyrene-quinone of the following probable formula bluish red claim 9. I

11 Asa new product, a monobromo-dichloro- 4.5.8.9-dibenzpyrene-3.l0 quinone of the following probable formula:

tint than the product claimed in orange-red tints. v

I GEORG KRAENZLEIN.-

HEINRICH 'VOLLMANN; HANS BECKER.

dyeing f cotton from a reddish-violet vat clear 

